Updated required PHP version to now specify 5.5

since 5.4 is EOL'd.

Author: ionux

composer.json

@@ -9,46 +9,39 @@
         {
             "name": "Rich Morgan",
             "email": "[email protected]",
-            "role": "Team Lead Developer"
+            "role": "Creator and Lead Developer"
         }
     ],
-
     "repositories": [
 		{
 			"type": "git",
 			"url": "https://github.com/ionux/RichArbitraryPrecisionIntegerMath.git"
 		}
 	],
-
     "support": {
         "issues": "https://github.com/ionux/RichArbitraryPrecisionIntegerMath/issues",
         "email": "[email protected]",
         "source": "https://github.com/ionux/RichArbitraryPrecisionIntegerMath"
     },
-
     "autoload": {
         "psr-4": {
             "RAPIM\\": "src/"
         }
     },
-
     "autoload-dev": {
         "psr-4": {
             "RAPIM\\": "src/"
         }
     },
-
     "require": {
-        "php": ">=5.4.0",
+        "php": ">=5.5.0",
         "ext-bcmath": "*",
         "ext-openssl": "*"
     },
-
     "require-dev": {
         "phpunit/phpunit": "4.1.3",
         "ext-gmp": "*"
     },
-
     "suggest": {
         "ext-gmp": "Highest performing math extension and preferred for this library's mathematical calculations."
     }